Not a lot. If the laser module somehow broke off and pointed somewhere it would be bad, though it is not a very coherent beam actually so it wouldn't be horrible if you were watching and shut it off quickly (I did get laser safety glasses but they are cheap ones).
I did have lunch with a laser safety engineer about 20 years ago who scared the shit out of me talking about problems with blue lasers. That deterred me from ever playing with for example those big handheld laser pointers you can buy. But this module is about 30mm square and sits 5mm from the fabric, so not much light really escapes anyway. One important consideration is that there are no metal screws underneath the lasing area, so I'm not going to get dangerous reflections.
Anyway I lived alone and had no pets and I was always present while it operated. For my use I felt the safety was adequate, but obviously for something like university use it would need a full enclosure. This version is a prototype slash proof of concept.
I did have lunch with a laser safety engineer about 20 years ago who scared the shit out of me talking about problems with blue lasers. That deterred me from ever playing with for example those big handheld laser pointers you can buy. But this module is about 30mm square and sits 5mm from the fabric, so not much light really escapes anyway. One important consideration is that there are no metal screws underneath the lasing area, so I'm not going to get dangerous reflections.
Anyway I lived alone and had no pets and I was always present while it operated. For my use I felt the safety was adequate, but obviously for something like university use it would need a full enclosure. This version is a prototype slash proof of concept.